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Kirchoff's law:

Kirchoff’s First law or Current Law: In current carrying coils, the algebraic sum of all currents meeting at a junction is zero. The incoming currents are considered as positive and the outgoing currents are considered as negative.

According to Kirchoff’s law

I1 + I2 - I3 + I4 + I5 - I6 + I7 = 0

Kirchoff’s Second Law or Voltage law: In a closed circuit, the algebraic sum of emfs acting in that circuit is equal to the algebraic sum of the products of the currents and resistances of each part of the circuit.

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